I have to say I just don't like Gnome's design. The shift away from text and towards more and more abstract icons, the "don't theme my app movement", removing features I consider pretty essential like typeahead.... Maybe mobile is where their weird (to me) design choices will finally shine though. Also looking forward to what KDE can accomplish in this space.
My favorite thing about Gnome is that I don't have to use it. It's there so that the subsystems get used by normal people and bugs get hammered out and I can do the same thing with a small shell wrapper.
(Expressed otherwise: I kind of have to use parts of GNOME because it has infected GTK and it’s much more difficult to avoid GTK than to avoid the rest of GNOME.)